hawke



No. 620,9!9. Patented Mar. l4, I899. T. HAWKE.

ROTARY SUBSOIL ATTACHMENT FOB FLOWS.

(Application filed Dec. 81, 1897.)

3 Sheets-8heet I.

(No Model.)

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N0. 620,9I9. Patented Mar. l4, I899.

I T. HAWKYE.

ROTARY SUBSOIL ATTACHMENT FOB FLOWS.

(Application filed Dec. 31, 1897.)

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T. HAWKE.

ROTARY SUBSOIL ATTACHMENT FOR PLOWS.

(Application filed Dec. 31, 1897.) (No Model.) 3 Sheets-Sheet 3.

Patent ed Mar. l4, I899.

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UNITED STATES;

PATENT EEicE.

THOMAS IIATVKE, OF AUCKLAND, NEW ZEALAND.

ROTARY SUBSOIL ATTACHMENT FOR PLOWS.

SPECIFICATION forming part of Letters Patent No. 620,919, dated March 14, 1899.

Application filed December 31, 1897. Serial No. 665,120. (No model.)

To ctZZ whom, it may concern:

Be it known that LTHOMAS HAWKE,farmer,

a subject of Her Majesty the Queen of the- United Kingdom of Great Britain and Ireland, residing in the city of Auckland, in the'Provincial District of Auckland and Colony of New Zealand, have invented a new and useful Rotary Subsoiler Attachment 'for Plows; and I do hereby declare that the following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in rotary subsoiler attachments for plows, and has for its object a novel manner of combining and arranging a series of rotary subsoilers to a plow in such manner that they will readily operate to break up the subsoil in the furrows which the plowshare has passed over and failed to reach.

In the accompanying drawings, illustrating the invention, Figure 1 is a side elevation of my improved attachment. Fig. 2 is a plan View of the invention. Fig. 3 is an end view taken from a position in front of the subsoilers;-and Fig. i is a side elevation of a plow provided with two sets of subsoilers according to my invention, one set being located in front and to the right of and the other behind the plowshare.

The letter B indicates the frame for supporting the subsoilers, and A a horizontal frame-piece, herein termed a bridge, which rises from the frame B, as shown. Secured in the lower side members of the frame and extending between the same is a rod S,which is provided with a head at one end and at its opposite end is screw-threaded to receive a nut in the usual manner. Oup bearings or washers R are provided at each end of rod S, between the head and nut'thereof, respectively, and the sides of the frame. J ournaled on the rod S are a series of circular blades M, three being shown in the drawings, which are spaced apart bymeans of collars Q. These subsoilers or blades M are preferably made of thin highly-tempered steel. In order to prevent the blades from clogging, I provide a number of breakers N, which are secured at their upper ends to the bridge A and extend down between the blades, as shown in Fig. 3, in such manner as to practically fill up the entire space between two blades, but being out of contact therewith. These breakers will prevent the dirt clogging between blades, as will be understood. In order, further, to prevent the soil from adhering to the blades, I provide a series of cleaning-knives O and P, two knives being employed for each blade and located on opposite sides thereof. The knives O are hung from the bridge A and contact with one side of the blades M, while the knives P are secured to and project from the opposite end member of the frame in such manner as to press on the other side of the blades M. In the revolution of these blades the knives O and P will scrape the soil there= from and keep them clean and bright.

The ends of the frame opposite the bridge A are joined by a swivel member 0, which may be welded or otherwise fastened thereto,

or the frame B and swivel member 0 may be cast in one piece. The letter D indicates the other swivel member, the two members 0 and D being correspondingly bored to receive I a ring-bolt E, thereby forming a swivel-joint. This second swivel member D is also bored longitudinally to receive a bolt G, on which it is pivotally mounted, the lower end of a lever-arm L, which is provided with aspringcatch J, engaging notches in a segment K, being also mounted on said bolt and made fast to or cast integral with the swivel member D. The segment K is preferably cast integral with a bracket-arm F, which is pro vided with apertures H to permit it to be secured to the 'plowshare T. By means of the lever-arm L the frame B, carrying the sub soilers, may be raised or lowered to insure the blades M entering the soil to the required depth or to raise the subsoilers so that they will not operate on the ground at all. The bolt G,which supports the weight of the frame, is secured in a casting at the bottom of the segment K.

to the plow-beam and operated by a second lever-arm L. This device is intended to opcrate in the furrow made by the plow in its last round. This arrangement of subsoilers operates with great efficiency for the purpose intended and will save a great deal of labor in preparing the soil for crops. Either or both of the subsoilers can be applied to any form of plow, whether single furrow, gang, or sulky, and will operate equally well in either case.

Having thus described my invention, what I claim as new is- 1. A plow having a rotary subsoiler pivotally secured thereto and adapted to follow in the furrow made thereby, in combination with a rotary subsoiler located to the front and right of the plowshare and adapted to THOMAS. HAWVKE.

Vitnesses:

GEORGE WILLIAM BASLEY, CHARLES FREDERICK BENNETT. 

